Error 4MEM/9/40000000: 0x84e86298 ?

I have a macbook pro 17" Sn : C02G308GDF92 and I try to run Apple Hardware Test and comes error 4MEM/9/40000000: 0x84e86298. Anyone knows what's happening with my macbook ? Thanks.

That is a RAM issue. Take out the modules and clean the contacts. Then install therm and make certain that they are well seated.
If no success, download REMBER and run it overnight so that sufficient loops are executed.
http://www.kelleycomputing.net/rember/
This should determine if the modules are faulty or not.
Ciao.

Similar Messages

Apple hardware test error 4mem/9/40000000: 0x8475d598

Any help would be appreciated I'm at work and my MBP crashed twice (Running Traktor Pro 2 with Drobo Mini as an external HD via Thunderbolt. second display daisy chained on VGA with a rotating desktop image to the TV's ) ...Just got this error code from my late late 2011 15in MBP after it randomly restarted and I ran the hardware test
apple hardware test error 4mem/9/40000000: 0x8475d598
This was after it crashed earlier and I got this report:
Anonymous UUID:       5948A12D-654D-DE02-D43C-4073A8690165
Sat Jun 21 17:31:41 2014
panic(cpu 0 caller 0xffffff8000a2ebe9): "Spinlock acquisition timed out: lock=0xffffff8024478110, lock owner thread=0x8000000000000000, current_thread: 0xffffff8025f64cf0, lock owner active on CPU 0xffffffff, current owner: 0x8000000000000000"@/SourceCache/xnu/xnu-2422.100.13/osfmk/i386/locks_i386.c:36 5
Backtrace (CPU 0), Frame : Return Address
0xffffff81eb5f3ec0 : 0xffffff8000a22fa9
0xffffff81eb5f3f40 : 0xffffff8000a2ebe9
0xffffff81eb5f3f70 : 0xffffff8000ac989d
0xffffff81eb5f3fb0 : 0xffffff8000af3c76
BSD process name corresponding to current thread: com.apple.WebKit
Mac OS version:
13D65
Kernel version:
Darwin Kernel Version 13.2.0: Thu Apr 17 23:03:13 PDT 2014; root:xnu-2422.100.13~1/RELEASE_X86_64
Kernel UUID: ADD73AE6-88B0-32FB-A8BB-4F7C8BE4092E
Kernel slide:     0x0000000000800000
Kernel text base: 0xffffff8000a00000
System model name: MacBookPro8,2 (Mac-94245A3940C91C80)
System uptime in nanoseconds: 18623716072818
last loaded kext at 18480408803348: com.apple.driver.AppleIntelMCEReporter 104 (addr 0xffffff7f833c5000, size 49152)
last unloaded kext at 18566085554385: com.apple.driver.AppleIntelMCEReporter 104 (addr 0xffffff7f833c5000, size 32768)
loaded kexts:
com.TrustedData.driver.VendorSpecificType00 1.7.0
com.drobo.SCSI.ThunderBolt 1.1 [66012]
net.kromtech.kext.Firewall 2.3.6
com.attotech.driver.ATTOiSCSI 3.4.1b1
com.apple.driver.AppleBluetoothMultitouch 80.14
com.apple.filesystems.smbfs 2.0.2
com.apple.driver.AppleHWSensor 1.9.5d0
com.apple.filesystems.autofs 3.0
com.apple.driver.AudioAUUC 1.60
com.apple.driver.AGPM 100.14.15
com.apple.iokit.IOBluetoothSerialManager 4.2.4f1
com.apple.driver.AppleMikeyHIDDriver 124
com.apple.driver.AppleMikeyDriver 2.6.1f2
com.apple.driver.AppleUpstreamUserClient 3.5.13
com.apple.iokit.IOUserEthernet 1.0.0d1
com.apple.kext.AMDFramebuffer 1.2.2
com.apple.Dont_Steal_Mac_OS_X 7.0.0
com.apple.driver.AppleHDA 2.6.1f2
com.apple.driver.AppleHWAccess 1
com.apple.AMDRadeonX3000 1.2.2
com.apple.driver.AppleMCCSControl 1.1.12
com.apple.driver.AppleIntelHD3000Graphics 8.2.4
com.apple.driver.AppleSMCPDRC 1.0.0
com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.2.4f1
com.apple.driver.AppleSMCLMU 2.0.4d1
com.apple.driver.AppleMuxControl 3.5.26
com.apple.driver.AppleLPC 1.7.0
com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0
com.apple.driver.SMCMotionSensor 3.0.4d1
com.apple.kext.AMD6000Controller 1.2.2
com.apple.driver.AppleIntelSNBGraphicsFB 8.2.4
com.apple.driver.AppleThunderboltIP 1.1.2
com.apple.driver.AppleUSBTCButtons 240.2
com.apple.driver.AppleUSBTCKeyboard 240.2
com.apple.driver.AppleIRController 325.7
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache 35
com.apple.iokit.SCSITaskUserClient 3.6.6
com.apple.driver.XsanFilter 404
com.apple.driver.AppleUSBHub 666.4.0
com.apple.iokit.IOAHCIBlockStorage 2.5.1
com.apple.driver.AppleSDXC 1.5.2
com.apple.iokit.AppleBCM5701Ethernet 3.8.1b2
com.apple.driver.AirPort.Brcm4331 700.20.22
com.apple.driver.AppleFWOHCI 5.0.2
com.apple.driver.AppleAHCIPort 3.0.0
com.apple.driver.AppleUSBEHCI 660.4.0
com.apple.driver.AppleSmartBatteryManager 161.0.0
com.apple.driver.AppleACPIButtons 2.0
com.apple.driver.AppleRTC 2.0
com.apple.driver.AppleHPET 1.8
com.apple.driver.AppleSMBIOS 2.1
com.apple.driver.AppleACPIEC 2.0
com.apple.driver.AppleAPIC 1.7
com.apple.driver.AppleIntelCPUPowerManagementClient 217.92.1
com.apple.nke.applicationfirewall 153
com.apple.security.quarantine 3
com.apple.driver.AppleIntelCPUPowerManagement 217.92.1
com.apple.iokit.IOSCSIBlockCommandsDevice 3.6.6
com.apple.iokit.IOSCSIParallelFamily 3.0.0
com.apple.driver.AppleThunderboltDPOutAdapter 3.1.7
com.apple.driver.AppleThunderboltPCIUpAdapter 1.4.5
com.apple.driver.IOBluetoothHIDDriver 4.2.4f1
com.apple.driver.AppleMultitouchDriver 245.13
com.apple.driver.AppleUSBAudio 2.9.5f4
com.apple.kext.triggers 1.0
com.apple.iokit.IOSerialFamily 10.0.7
com.apple.iokit.IOSurface 91.1
com.apple.iokit.IOBluetoothFamily 4.2.4f1
com.apple.driver.DspFuncLib 2.6.1f2
com.apple.vecLib.kext 1.0.0
com.apple.iokit.IOAudioFamily 1.9.7fc2
com.apple.kext.OSvKernDSPLib 1.14
com.apple.iokit.IOAcceleratorFamily 98.20
com.apple.driver.AppleSMBusController 1.0.11d1
com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.2.4f1
com.apple.driver.AppleSMBusPCI 1.0.12d1
com.apple.driver.AppleBacklightExpert 1.0.4
com.apple.driver.AppleGraphicsControl 3.5.26
com.apple.driver.IOPlatformPluginLegacy 1.0.0
com.apple.driver.IOPlatformPluginFamily 5.7.0d11
com.apple.driver.AppleSMC 3.1.8
com.apple.kext.AMDSupport 1.2.2
com.apple.AppleGraphicsDeviceControl 3.5.26
com.apple.iokit.IONDRVSupport 2.4.1
com.apple.driver.AppleHDAController 2.6.1f2
com.apple.iokit.IOGraphicsFamily 2.4.1
com.apple.iokit.IOHDAFamily 2.6.1f2
com.apple.iokit.IOFireWireIP 2.2.6
com.apple.driver.AppleUSBMultitouch 240.9
com.apple.driver.AppleThunderboltDPInAdapter 3.1.7
com.apple.driver.AppleThunderboltDPAdapterFamily 3.1.7
com.apple.driver.AppleThunderboltPCIDownAdapter 1.4.5
com.apple.iokit.IOUSBHIDDriver 660.4.0
com.apple.driver.AppleUSBMergeNub 650.4.0
com.apple.driver.AppleUSBComposite 656.4.1
com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.6.6
com.apple.iokit.IOBDStorageFamily 1.7
com.apple.iokit.IODVDStorageFamily 1.7.1
com.apple.iokit.IOCDStorageFamily 1.7.1
com.apple.driver.AppleThunderboltNHI 2.0.1
com.apple.iokit.IOThunderboltFamily 3.2.7
com.apple.iokit.IOAHCISerialATAPI 2.6.1
com.apple.iokit.IOSCSIArchitectureModelFamily 3.6.6
com.apple.iokit.IOUSBUserClient 660.4.2
com.apple.iokit.IOEthernetAVBController 1.0.3b4
com.apple.driver.mDNSOffloadUserClient 1.0.1b5
com.apple.iokit.IO80211Family 630.35
com.apple.iokit.IONetworkingFamily 3.2
com.apple.iokit.IOFireWireFamily 4.5.5
com.apple.iokit.IOAHCIFamily 2.6.5
com.apple.iokit.IOUSBFamily 677.4.0
com.apple.driver.AppleEFINVRAM 2.0
com.apple.driver.AppleEFIRuntime 2.0
com.apple.iokit.IOHIDFamily 2.0.0
com.apple.iokit.IOSMBusFamily 1.1
com.apple.security.sandbox 278.11
com.apple.kext.AppleMatch 1.0.0d1
com.apple.security.TMSafetyNet 7
com.apple.driver.AppleKeyStore 2
com.apple.driver.DiskImages 371.1
com.apple.iokit.IOStorageFamily 1.9
com.apple.iokit.IOReportFamily 23
com.apple.driver.AppleFDEKeyStore 28.30
com.apple.driver.AppleACPIPlatform 2.0
com.apple.iokit.IOPCIFamily 2.9
com.apple.iokit.IOACPIFamily 1.4
com.apple.kec.corecrypto 1.0
com.apple.kec.pthread 1
Model: MacBookPro8,2, BootROM MBP81.0047.B27, 4 processors, Intel Core i7, 2.2 GHz, 16 GB, SMC 1.69f4
Graphics: Intel HD Graphics 3000, Intel HD Graphics 3000, Built-In, 512 MB
Graphics: AMD Radeon HD 6750M, AMD Radeon HD 6750M, PCIe, 512 MB
Memory Module: BANK 0/DIMM0, 8 GB, DDR3, 1333 MHz, 0x857F, 0x483634314755363746393333334700000000
Memory Module: BANK 1/DIMM0, 8 GB, DDR3, 1333 MHz, 0x857F, 0x483634314755363746393333334700000000
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xD6), Broadcom BCM43xx 1.0 (5.106.98.100.22)
Bluetooth: Version 4.2.4f1 13674, 3 services, 23 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
PCI Card: scsi, SCSI Bus Controller, Thunderbolt@195,0,0
Serial ATA Device: Samsung SSD 840 EVO 250GB, 250.06 GB
Serial ATA Device: MATSHITADVD-R   UJ-8A8
USB Device: FaceTime HD Camera (Built-in)
USB Device: Hub
USB Device: BRCM2070 Hub
USB Device: Bluetooth USB Host Controller
USB Device: Apple Internal Keyboard / Trackpad
USB Device: Hub
USB Device: Duet USB
USB Device: IR Receiver
Thunderbolt Bus: MacBook Pro, Apple Inc., 22.1
Thunderbolt Device: Mini, Drobo, 1, 26.3

The Apple Hardware Test error indicates a RAM issue. Install the original RAM and see if that improves the situation.
Also these items may perhaps be conributing causes:
TrustedData.driver.VendorSpecificType00 1.7.0
.drobo.SCSI.ThunderBolt 1.1 [66012]
.kromtech.kext.Firewall 2.3.6
attotech.driver.ATTOiSCSI 3.4.1b1
Ciao.

Error 4MEM/61/40000000: 0x8317eb18

I everyone,
I have some problems with my Macbook Pro late 2011, I ran the Hardware Test, and it tell me now that i have a error 4MEM/61/40000000: 0x8317eb18...
Can anyone know how to fix this ? Thank you a lot.
(Sorry for the english mistakes, I'm french)

Remove and reinsert the computer’s RAM, or use different modules; click here for more information.
(120095)

Error:4MEM/62/40000000: 0x83128718

Hii all,
I did Hardware test for my Macbook pro and I receive this error:
Alert! Apple Hardware Test has detected an error
4MEM/62/40000000: 0x83128718
What the problem in this cause

Apple doesn't release the specific error codes for their hardware tests. This would indicate faulty RAM, however. One of your RAM modules has failed and needs to be replaced.

What is the error 4MEM/61/40000000: 0x8316fc98 in hardware test?

Hi, everyone!
I'm doing a hardware test in boot (option + D) and appears the error 4MEM/61/40000000: 0x8316fc98 about the hardware...
What is this error? Can I have more details?
Thx
Fellipe Russo

But in my "about this mac" appears "ok" status with the two 4gb that I have in macbook pro. What can be the problem? Bad connection? Because its working normally...
Please help me

Error 4mem/62/40000000: 0x7f568790

Hace una semana actualice la memoria ram de mi macbook. Ayer de un momento a otro se reinicio y la pantalla se quedo en gris. hoy corrí el diagnostico y arrojo este error 4mem/62/40000000: 0x7f568790. Todo el tiempo se enciende y se reinicia porque dice que tiene un problema. Las tarjetas de memoria ram son las adecuadas para el equipo. No se que hacer.
MacBook Pro (13", Mid 2012)
Procesador 2.5 GHz Intel core i5
Memoria 8 GB 1600 MHz DDR3
OS X Yosemite versión 10.10.1

Google translate:
A week ago RAM Memory upgrade my macbook. Yesterday from time to time is reset and the screen he stayed in gray. Today ran the diagnosis and throw this error 4mem / 62/40000000: 0x7f568790. All time lights and restarts it says you have a problem. RAM cards are appropriate for your computer. Not to do.
MacBook Pro (13 "Mid 2012)
Processor 2.5 GHz Intel core i5
Memory 8 GB 1600 MHz DDR3
Yosemite OS X version 10.10.1
MacBook Pro, OS X Mountain Lion (10.8.2)
That error means yo have a memory problem.
- First try removing and reinstalling the RAM
- Next try one stick at a time.
- What specific memory did yo install? Did the manufacturer specifically say it will work in specific Mac? Macs are picky about memory.
BTW, this is the Mac Pro desktop forum

Macbook Pro error: "4MEM/9/40000000: 0XA9F79218

My Macbook Pro keeps showing the "Restart your computer" notice. I ran the Hardware Test and I got error "4MEM/9/40000000: 0XA9F79218. Should I use the re-install dvd that came with the computer? Any help much appreciated!

When i want to use Chrome MAPs same restart happening...

What does the error 4mem/60/40000000: 0x843c0318?

Hi
I got this error 4mem/60/40000000: 0x843c0318 a few days after I updated my OS to the new Yosemite OS. Does anyone know what this error means?
I have a late 2011 MBP

Your MacBook Pro has a memory problem. Have it replaced.

ERROR: 4MEM/1/40000000: 328493f0

I ran Apple Hardware test to diagnose of a kernel panic (thanks Baby boomer): The following errors were detected but I cant find any additional info about them.
4MEM/1/40000000: 328493f0
4MEM/1/40000000: 4c1aa38
4MEM/1/40000000: 321013f0
Could anyone please help me? Thank you very much

something wrong with your ram.

I got this error: 4MEM/62/40000000:0x82c67b18, what does it mean and how can I fix it?

I ran an Apple Hardware Test because my memory and display seems to not be working properly.
Any help would be appreciated, thanks.
About my Mac:
MacBook Pro 15' Early 2011 Version
OS X Version 10.9.4
Processor: 2GHz Intel Core i7
Memory: 8GB 133 MHz DDR3
Graphics: AMD Radeon HD 6490M 256 MB

That indicates that there is a problem with your RAM or the RAM bays. First step is to take out the RAM modules, clean the contacts and reinstall them. Make certain that they are well seated.
If no success, post back.
Ciao.

What do I do with the error 4mem/9/40000000: 0x7r5f9990

I got an erro with this code after doing the apple hardware test, how can I fix it?

Replace the RAM with high quality RAM that says its made for your Mac model and age of Mac. I.e. late 2008 MacBook Pro RAM is what you would for that age MacBook Pro, and not just any 1066 MHz PC3-8500 DDR3 RAM will do. So first identify your model:
https://discussions.apple.com/docs/DOC-6413
Then look at http://www.crucial.com/ or http://www.macsales.com/ for the right RAM. If neither works, bring it in for service.
Do not get ValueRAM.

What does a 4MEM/62/40000000: 0x82c5e018 error mean?

Hi,
my MacBook Pro late 2011doesn't boot normally it shows pixel dots /line dots during starting screen (apple logo) .. I erase partition which took 22 hours & reinstall OS X Mavericks.
sometime I need to shutdown it & restart then it works normal
I did the AHT and got the following error:
4MEM/62/40000000: 0x82c5e018
Processor 2.4 GHz Intel Core i7
Memory 8 GB 1333 MHz DDR3
Graphics Intel HD Graphics 3000 512 MB
Software OS X 10.9.3 (13D65)
Thanks
basiloooz

Its memory failed. Replace it. Memory is not prohibitively expensive.
"Memory sold by the Apple Online Store is guaranteed to be compatible with your Macintosh."
http://store.apple.com/us/mac/mac-accessories/memory
Other than Apple there are only two vendors with which I have personal experience and can recommend: Crucial and OWC. People have reported problems with many other brands, yet Crucial and OWC's prices are as good as any you are likely to find.
Go to Crucial and download the little app that examines your system and recommends RAM upgrade options.
Their prices are good but don't have to buy memory from them - determine what you need and buy it from Crucial or OWC / MacSales.

Apple hard ware test 4mem/62/40000000 error

Hello everbody. I recently experienced an uncontrolled fan behaviour on my late 2012 iMac 21.5. The fan started to blow very noise when starting up and later after the iMac had started it turned to run slowlier but still with an - previously unexperienced - audible sound. After a while it ran faster/louder again and then back to slow. As this never happened before and I have definitely not performed any intensive computing and neither the temperature of the room is anything from being hot (about 22°C / 72°F) I believe there must be something wrong with the hardware. This uncontrolled behaviour of the fan happend several times and so I performed a resetting of the smc with no change in the fan operation. I also coudn't find any hint in any apple discussion forum either and so I decided to run the apple hardware test which resulted in an error:
4MEM/62/40000000: 0x818ccd90
Does anybody have an idea what that means?
Thanks for any advice.
PS: For some strange reason the fan seems to have stopped now.

That's a memory error; you may be able to resolve it by removing/cleaning/reseating the modules, & failing that, by testing with only some of them installed.

Hardware failure code 4MEM/61/40000000:0x812d7f90

Hi guys.
My macbookpro became very very slow and not even being able to start sometimes.
I did the full hardware scan (start computer then hold "D") and it returned the following error: 4MEM/61/40000000:0x812d7f90.
Memory problem? I did upgrade my mac from 4 to 8 GB one month after I bought it in a apple shop.
Thanks!

Yes. That is indicative of a defective byte in memory.

Same 4MEM/9/40000000 , but different aka (hopefully) the complete guide to this error code and changing RAM

Hello world,
finally, after having been reading here for years I decided to break silence and join the most venerable Apple discussions community!
First of all, I'm no native speaker, so if I at one point don't express myself correctly, I'm sorry. If you don't understand please ask what exactly I meant since it's very important that we know exactly what each one of us is talking about, thank you.
Important, too:
I know there are a lot of posts with this topic and I sifted through a lot of them but none of them captures exactly what my problem or rather my questions are and unfortunately in a lot of them there is no real feedback from the original poster how it all worked out or not. So, I intend this thread to be that one helpful thread which more or less concentrates the knowledge of the other threads, where people with similar problems can go to in future.
I ask one thing of you: Please DON'T answer with just one phrase à la "U got bad RAM, send it back" or "Contact Apple Customer Support Service whatever thingy" without explaining why this would be the only viable option (because I think it is not, at least at the moment).
All the questions I 'd like answered are green, for you to not lose track. I hope this becomes a good discussion so everyone of us can learn a lot!
Following problem:
Initial situation:
My Computer: MacBookPro 8.2, early 2011, 15", 2,2 GHz i7; Mavericks 10.9.5    (yet without this bash fix but ¯\_(ツ)_/¯ )
       - Upgraded RAM from onboard 4 (2 x 2) GB to the "unofficially" possible 16 (2 x 8) GB
Ordered RAM on Amazon.de with the right Specs: 204 pin DDR3 SO-DIMM (1333 MHz, PC3-10600S, CL9),
Manufacturer: CSX (http://www.csx-memory.com , while it's maybe not the most renown seller, it was described on another website as reliable )
    HERE (hope the link doesn't change):               http://www.amazon.de/gp/product/B0084SH6WA/ref=oh_aui_detailpage_o01_s00?ie=UTF8 &psc=1
       - Installed it, booted Mac without problem, what does System Profiler say? I have full 16 GB   1600 MHz   Memory installed
- Obviously sent me the "wrong" RAM (or can System Profiler be wrong??), funny thing: It works,
     --> after a LOT of research checked here http://guides.macrumors.com/Buying_RAM      my i7 is 2720QM, so supports it, lucky me
   Btw, if i go to About this Mac > more information > memory, the Text there even says it can hold 1600 MHz, has this been written there like this all along?!
- Which RAM do I have installed exactly now? since the sticker on it showed the originally ordered Specs.., moreover how do I determine the CAS latency of my installed RAM?
Crashes:
Didn't really have any, except..... well,
- In some instances Firefox (I think 32.02. or sth., the latest Version at this moment) reproduceably keeps crashing, for example right now, can't even start it, that's why I can't tell you the exact version, maybe I edit that later. Safari so far hasn't crashed.
- Once I had a System Crash, but it happened when I wanted to reboot after updating the firmware of a hooked on external WD drive to be usable again as time machine backup volume under mavericks (without endangering my data).
The RAM seems to work fine; for example when I was doing a long overdue backup of 77GB on said drive, Activity Monitor showed a RAM Usage of 15,99 GB and nothing crashed. Only the fans were powering at some point but i thought that normal..
- Actually produced two more Crashes when trying to run Apple Hardware Test (AHT), the one on the second disc that originally came with my Computer (probably made for OS 10.6.x    x= 6 or sth., don't remember which version my MBP was shipped with), which leads to
Tests:
Memtest86
- I put Memtest86 v.5.01 on a USB Stick and bootet from that and let it test "the whole" RAM
(btw Do you know how you can put the bootable USB image of Memtest only to one (of a few) partition of my 32 GB USB Stick? The instructions (command line stuff) only let me put it on the whole Stick which makes it otherwise useless as a volume; ok here I'm not sure if I'm using the correct technical terms....)
- I let Memtest86 do 3 and a half passes with one pass consisting of 10 different tests, so it took over 8 hours!
--> RESULT:   0   (in words: zero) ERRORS,
--> That is why I think my RAM is ok, because I think (think NB, don't know) Memtest86 does good testing,or do you know      better?
AHT
- After that, out of curiosity, I tried to run AHT from the DVD with said results, then I ran AHT (also called Apple Diagnostics under Mavericks) from the Internet, this worked, but produced the famous 4MEM/9/40000000 Error Code,
first one for example was: 4MEM/9/40000000: 0x8477df98, the last part after the colon is variable, but stays the same in one instance, i.e. if you repeat the AHT directly. If you restart the Computer an rerun the test then it changes, e.g. some other it showed 0x84770a18
- I did the short and the extended version, it took ca. 2-3 and 16 min respectively till producing the Error Code (only 1 at a time)
- Did it 4 times or so; once in short/simple version it showed no error, the rest the 4MEM/9 s.
some example of a simple test, results taken out of the System Profiler Window (fehlgeschlagen= failed):
Apple Diagnostics:
The usual self test on start up is always passed (bestanden), see for example:
What other than bad RAM can 4MEM/9/40000000 mean? I hope there are a few tech and computer savvy people around this place who know what they are talking about and can give me a good answer, or at least help to narrow it down. Actually I also think, the RAM sticks are not loose, but before I screw open my MBP again I would like to explore the other possibilities.
Is it probable that this Error Code has got sth. to do with me installing a) 16 GB of b) 1600 MHz RAM, or maybe with CAS Latency (i don't know the actual CL of this RAM)? and if so, is it only because some Apple Programmer/Developer/Technician wrote some values in a list on the System Level, so it doesn't accept RAM it would normally work with?? If it works fine and is faster, why change it?
Final Words:
I repeat, apart from the Firefox crashes, my Mac seems to be working fine, at least I don't notice anything, (well, that disk utility and System Profiler (or whatever it's called nowadays) sometimes take time to start up is nothing special i think, is it?)
But now I'm scared that perhaps there could be a future danger for my computer I do not foresee...I hope you can at least exclude that.
So I'd rather spend my time starting a discussion here with people who don't have to abide by some corporate policy (right?) than having the hassle of repeatedly screwing my Mac open and shut and doing expensive calls with all the companies involved who won't tell me anything more in depth than "we have to send it there, do more tests and you get it back then".
I hope that this thread won't rot in the wastelands of unanswered posts and that maybe all the people who take part in it learn sth. and all the people seeking help in future will find it here.
Thanks for your patience!
Waiting for your greatly appreciated answers,
MuddyMic
PS: Why is there no category Hardware, Components, RAM or sth similar? Not sure if it fits in Ports and Interfaces so I put it under Using a MBP

Hello world,
finally, after having been reading here for years I decided to break silence and join the most venerable Apple discussions community!
First of all, I'm no native speaker, so if I at one point don't express myself correctly, I'm sorry. If you don't understand please ask what exactly I meant since it's very important that we know exactly what each one of us is talking about, thank you.
Important, too:
I know there are a lot of posts with this topic and I sifted through a lot of them but none of them captures exactly what my problem or rather my questions are and unfortunately in a lot of them there is no real feedback from the original poster how it all worked out or not. So, I intend this thread to be that one helpful thread which more or less concentrates the knowledge of the other threads, where people with similar problems can go to in future.
I ask one thing of you: Please DON'T answer with just one phrase à la "U got bad RAM, send it back" or "Contact Apple Customer Support Service whatever thingy" without explaining why this would be the only viable option (because I think it is not, at least at the moment).
All the questions I 'd like answered are green, for you to not lose track. I hope this becomes a good discussion so everyone of us can learn a lot!
Following problem:
Initial situation:
My Computer: MacBookPro 8.2, early 2011, 15", 2,2 GHz i7; Mavericks 10.9.5    (yet without this bash fix but ¯\_(ツ)_/¯ )
       - Upgraded RAM from onboard 4 (2 x 2) GB to the "unofficially" possible 16 (2 x 8) GB
Ordered RAM on Amazon.de with the right Specs: 204 pin DDR3 SO-DIMM (1333 MHz, PC3-10600S, CL9),
Manufacturer: CSX (http://www.csx-memory.com , while it's maybe not the most renown seller, it was described on another website as reliable )
    HERE (hope the link doesn't change):               http://www.amazon.de/gp/product/B0084SH6WA/ref=oh_aui_detailpage_o01_s00?ie=UTF8 &psc=1
       - Installed it, booted Mac without problem, what does System Profiler say? I have full 16 GB   1600 MHz   Memory installed
- Obviously sent me the "wrong" RAM (or can System Profiler be wrong??), funny thing: It works,
     --> after a LOT of research checked here http://guides.macrumors.com/Buying_RAM      my i7 is 2720QM, so supports it, lucky me
   Btw, if i go to About this Mac > more information > memory, the Text there even says it can hold 1600 MHz, has this been written there like this all along?!
- Which RAM do I have installed exactly now? since the sticker on it showed the originally ordered Specs.., moreover how do I determine the CAS latency of my installed RAM?
Crashes:
Didn't really have any, except..... well,
- In some instances Firefox (I think 32.02. or sth., the latest Version at this moment) reproduceably keeps crashing, for example right now, can't even start it, that's why I can't tell you the exact version, maybe I edit that later. Safari so far hasn't crashed.
- Once I had a System Crash, but it happened when I wanted to reboot after updating the firmware of a hooked on external WD drive to be usable again as time machine backup volume under mavericks (without endangering my data).
The RAM seems to work fine; for example when I was doing a long overdue backup of 77GB on said drive, Activity Monitor showed a RAM Usage of 15,99 GB and nothing crashed. Only the fans were powering at some point but i thought that normal..
- Actually produced two more Crashes when trying to run Apple Hardware Test (AHT), the one on the second disc that originally came with my Computer (probably made for OS 10.6.x    x= 6 or sth., don't remember which version my MBP was shipped with), which leads to
Tests:
Memtest86
- I put Memtest86 v.5.01 on a USB Stick and bootet from that and let it test "the whole" RAM
(btw Do you know how you can put the bootable USB image of Memtest only to one (of a few) partition of my 32 GB USB Stick? The instructions (command line stuff) only let me put it on the whole Stick which makes it otherwise useless as a volume; ok here I'm not sure if I'm using the correct technical terms....)
- I let Memtest86 do 3 and a half passes with one pass consisting of 10 different tests, so it took over 8 hours!
--> RESULT:   0   (in words: zero) ERRORS,
--> That is why I think my RAM is ok, because I think (think NB, don't know) Memtest86 does good testing,or do you know      better?
AHT
- After that, out of curiosity, I tried to run AHT from the DVD with said results, then I ran AHT (also called Apple Diagnostics under Mavericks) from the Internet, this worked, but produced the famous 4MEM/9/40000000 Error Code,
first one for example was: 4MEM/9/40000000: 0x8477df98, the last part after the colon is variable, but stays the same in one instance, i.e. if you repeat the AHT directly. If you restart the Computer an rerun the test then it changes, e.g. some other it showed 0x84770a18
- I did the short and the extended version, it took ca. 2-3 and 16 min respectively till producing the Error Code (only 1 at a time)
- Did it 4 times or so; once in short/simple version it showed no error, the rest the 4MEM/9 s.
some example of a simple test, results taken out of the System Profiler Window (fehlgeschlagen= failed):
Apple Diagnostics:
The usual self test on start up is always passed (bestanden), see for example:
What other than bad RAM can 4MEM/9/40000000 mean? I hope there are a few tech and computer savvy people around this place who know what they are talking about and can give me a good answer, or at least help to narrow it down. Actually I also think, the RAM sticks are not loose, but before I screw open my MBP again I would like to explore the other possibilities.
Is it probable that this Error Code has got sth. to do with me installing a) 16 GB of b) 1600 MHz RAM, or maybe with CAS Latency (i don't know the actual CL of this RAM)? and if so, is it only because some Apple Programmer/Developer/Technician wrote some values in a list on the System Level, so it doesn't accept RAM it would normally work with?? If it works fine and is faster, why change it?
Final Words:
I repeat, apart from the Firefox crashes, my Mac seems to be working fine, at least I don't notice anything, (well, that disk utility and System Profiler (or whatever it's called nowadays) sometimes take time to start up is nothing special i think, is it?)
But now I'm scared that perhaps there could be a future danger for my computer I do not foresee...I hope you can at least exclude that.
So I'd rather spend my time starting a discussion here with people who don't have to abide by some corporate policy (right?) than having the hassle of repeatedly screwing my Mac open and shut and doing expensive calls with all the companies involved who won't tell me anything more in depth than "we have to send it there, do more tests and you get it back then".
I hope that this thread won't rot in the wastelands of unanswered posts and that maybe all the people who take part in it learn sth. and all the people seeking help in future will find it here.
Thanks for your patience!
Waiting for your greatly appreciated answers,
MuddyMic
PS: Why is there no category Hardware, Components, RAM or sth similar? Not sure if it fits in Ports and Interfaces so I put it under Using a MBP

Error 4MEM/9/40000000: 0x84e86298 ?

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